SOLUTION: how to factor: 3a^2-4a-4

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Question 816908: how to factor:
3a^2-4a-4
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
3a^2-4a-4
What are factors of -12 (3*-4) which add up to -4
-6 and 2
3a^2-6a+2a-4
3a*(a-2) + 2*(a-2)
(3a+2)*(a-2)
foil back to
3a^2-4a-4